MESON Chess Problem Database

Problem Display
PID: 54777 (4b2K/1pp1B3/4R2p/3k4/R2NpP2/3B1n2/5NQr/4r1bq w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Cross-Check, 1996

4b2K/1pp1B3/4R2p/3k4/R2NpP2/3B1n2/5NQr/4r1bq

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bxe4#
    • 1...Rb1
      • 2.Bxe4#
    • 1...Rc1
      • 2.Bxe4#
    • 1...Rd1
      • 2.Bxe4#
    • 1...Rf1
      • 2.Bxe4#
    • 1...Sd2
      • 2.Re5#
    • 1...Sxd4
      • 2.Bc4#
    • 1...Sh4
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sg5
      • 2.Re5#
    • 1...e3
      • 2.Be4#
      • 2.Re5#
    • 1...c5
      • 2.Rd6#
  • Tries
    • 1.Rd6+?
      • 1...Kc5
        • 2.Sb3#
        • 2.Se6#
        • 2.Rc4#
      • 1...cxd6!
    • 1.Qg5+?
      • 1...Se5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Sxg5
        • 2.Re5#
      • 1...hxg5+!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Re5#
      • 1...Bxa4
        • 2.Rxe4#
      • 1...Sxd4
        • 2.Bc4#
      • 1...Bf7
        • 2.Qd8#
      • 1...Se5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::B(C),XP(f)
    • S(e);N_GUARD,P_SPINP(f)::R1(G)
    • S(e);P_SPINP(f),SBLOCK,XS(E)::B(C)
    • S(e);N_GUARD,P_SPINP(f)::R1(G),XS(e)
    • P(j);N_GUARD,SBLOCK::R1(G)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • P(j);XR(G)
    • Try
      • Q(B);CHECK
      • Vars
        • S(e);N_GUARD,XQ(B)::R1(G)
      • Refutation
        • P(h);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(G),DCHECK
    • Vars
      • B(k);N_GUARD,XR(D)::QAB(B)+R(G),XP(f)
      • S(e);SBLOCK,XS(E)::B(C)
      • B(k);OGATE::QAR(B)
      • S(e);::QAB(B)+R(G),DCHECK,XS(e)
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